LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Need help with Oil Leak and Coolant leak (with pics)

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Old Oct 21, 2010 | 09:06 PM
  #1  
bds001's Avatar
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Joined: Sep 2007
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From: NW Arkansas
Need help with Oil Leak and Coolant leak (with pics)

Ok so I've got an oil leak somewhere, and I cant find out where it's coming from. I've had the leak since it was rebuilt 4,000 miles ago. Was hoping someone would be able to give some pointers for where all to look check.

Most of the oil ends up on the bolt and the sensor on the bottom of the timing chain cover as well on the front sway bar. There is oil on the front of the cover, as well as on the bottom of the opti.



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Could my oil pressure be too high? I had been using Castrol GTX 5w-30 since rebuilding the motor 4000 miles ago, but I changed the oil today and switched to Rotella 10w-30. The gauge had been reading at about the half way line with the Castrol, and is now reading about the 3/4 line.

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Recently is has seemed that my car has been "using" antifreeze. I usually just top it off when the light comes on for low coolant. I filled it up today however, and the light did not go off. Checked the radiator and it's still fairly full.

A new problem has developed, as after I topped off the coolant and changed the oil, there seems to be a for sure leak somewhere as I stopped at a gas station a block from my house and there was a puddle of coolant on the ground after I filled up. There was also coolant that had sprayed on the underside of the hood and there was some on top of the intake as well.

Before I couldnt ever see a source for the lost coolant. It doesnt seem to leak when just sitting there, only when it gets heated up and going. The engine isnt getting any hotter than normal.

any help is much appreciated from anybody, especially you Fred
Old Oct 21, 2010 | 10:57 PM
  #2  
jethrobodean's Avatar
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Joined: Jun 2010
Posts: 67
From: Southern Wisco
leak

More than likely the water pump drive shaft seal was put on wrong by a machinist that didnt know how to. I had the same problem with my fresh rebuild. Ended up replacing the seal 3x before I just dump a quart of lucas oil stop leak.. dried up the leak..the antifreeze is probably coming off the the coolant hoses that supply the TB or the return line from the heads.. Feel around after it has cooled. Probably just needs a clamp snugged. Might be coming from the bottom of your water pump too. better find it before it cost you even more money.
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